Tube Amp for Avalon Ascendants

I have a pair of Sonic Frontier Power 3's that I've had (and loved) for at least 10 years (bought them used through Audiogon so not sure exactly how old they are). They both need work now and so trying to decide whether it makes sense to put the money into repairing them or replace them since i've also recently changed speakers (originally got the Sonic Frontiers when i had Thiel 6's) and now have the Avalon Ascendants. Also recently upgraded the rest of my system to:

Conrad Johnson CT-5 pre-amp
EAR Acute 3 CD Player (replaced the tubes with Siemens 1963 E88CC)
AudioQuest Volcano speaker cables and Sky Reference interconnedt

Looking for advise and comments as to whether people think its worth putting the money into the Sonic Frontiers (not sure what the problem is yet so don't know exactly what it will cost to have them repaired -- on one i keep blowing the fuses and on the other getting an audible hum coming from the amp) there is a better tube amp for my Avalons?

Always gotten wonderful advise from this board over the last decade or more so thought i'd check in again.

Thanks in advance for all comments.